1000w HPS covers an area of?

[bejay]

the sun may not be able to penetrate foilage or shaded areas but it does not lose its intensity like a light for every foot it loses half of its intensity.
ok if you have 140,000 lumens at 1 ft away to begin with and you lose half its intensity for every foot away the light is and at 4 ft I get 17,500 lumens in a 16 sq ft garden with a 1000 watt lamp 4 ft away that would be 1094 lumens per sq ft.
there is a link below that explains lumens and lights in more detail.
http://www.hydroempire.com/store/hyd...osynthesis.php

bejay Reviewed by bejay on 12-18-2006. 1000w HPS covers an area of? Hi, Just a quick question. What is the space to be used with a 1000w HPS light? I'm asking because I was wondering how much of these lamps I'd need to cover a space of 11x10. Rating: 5

[Garden Knowm]

YES BEJAY i agree!!! even more reason to keep the light CLOSE..

iloveyou

[CaliJay]

Studies prove the plant can only use 10,000 lumens. That was the point I was making. Why place the light closer even though it won't penetrate when you can get a wider footprint by raising it? You could then add more plants or spread apart the ones you have? I still have not seen any information other than opinion from anyone?
Please take the time to show your sources of info rather than continuing the myths.

I have been looking at pics of a lot of commercial grows with huge dense buds and the lights are ALWAYS about 36 in from what I can tell from the photos.

BTW BJ...I admit that the nutes probably had something to do with the burning foliage. I believe I reversed the flow of water and drew out moisture from the plant at the same time as lowering my lights. It is possible that had my nutes been correct the plants would not have burned. I am a noob and am just trying to make sure I learn the lesson so I at least get something out of my screw up :0(

Love -Jay

[CaliJay]

the sun may not be able to penetrate foilage or shaded areas but it does not lose its intensity like a light for every foot it loses half of its intensity.
ok if you have 140,000 lumens at 1 ft away to begin with and you lose half its intensity for every foot away the light is and at 4 ft I get 17,500 lumens in a 16 sq ft garden with a 1000 watt lamp 4 ft away that would be 1094 lumens per sq ft.
there is a link below that explains lumens and lights in more detail.
http://www.hydroempire.com/store/hyd...osynthesis.php

BJ you should check the math.

Page 179. Marijuana Horticulture - Jorge Cervantes

1000w 140 lumens per watt.

1foot(30cm) 140,000 lumens
2feet(60cm) 35,000
3feet(90cm) 15,555
4feet(120cm) 9999( this is your target. anything more is wasted)

That is assuming you are not using a Solarmax or hortilux bulb which would be more lumens.

10,000 lumens to your canopy at 4 feet. The light is also gives you better light distribution which equals a more even canopy.

4x4 = 16sqft, 1000w / 16sqft = 62.5 watts per sqft.


BJ please explain your grow show and it might explain your take on the subject? Are you closet growing? The facts are there for you all to see.

Gnome? any data to support your point to keep lamps so close?

Bear...Can you repost the link?

Jay

[BlueBear]

Well, CJ, I think that you are considering this in a logical way because of the fact that what your saying does make since, but at the same time, IMO you have to remember that you can easily find more documented grows in one day over the net than someone like ED or Green have seen in 2 years of going to places and though there knowledge is great, some of the principles are more general than specific IMO.
I think that when you look at the 100 of grows on the different boards and follow the grows where people are getting the kolas as big as your head that you will see that indeed they are faithfully bringing lights as close as possible. For every 1 grow that you might find where a person is getting killer harvests with lights 36 inches away you could find about 20 or more where there getting them with the lights closer. Also, I believe that you may achieve similar results with some different growing styles having lights further away than 12 to 18 inches, but the knowledge that is needed to make up for the difference most do not possess, along with the other equipment that is needed to supplement the factor of the lights not being as close. Fore instance, look at tranables grow, he has the lights over 18 inches away I believe, but as you know by now he has all of the bells and whistles and a bucket of knowledge to go along with it and that is why his thread is the longest active thread around here, but do a quarter of people growing have his knowledge or equipment or the ability to use it if they did?? I think not. His grow is not typical in some ways, he even caught some slack over on OG for his style, but he proved them wrong as you can see with his results. But again, the man has his stuff down, but at the same time, in order to do a grow like him, with plant count numbers you are automatically put into the federal sentencing guide lines and would be facing a 10 year minimum for 2 of his tables and that doesn't include mothers and fresh cuttings. So using one grow to compare to dozens of other grows like the Crusty buckets where you can pull 3 pounds per plant with vertical lights sitting right on the plant, or KFB pulling 4 LB's off a plant or a BC grow I just read where they pulled 20LB off of 9 K of lights with 12 plants in a room that was 12x13 with some of the lights almost touching the leafs does not necessarily prove your findings in the way of real life experience, but rather more theory IMO, and I am not trying to knock the light studies, but rather pointing out real deal results.
I remember you stating before that the friend who was mentoring you and gave you your clones was getting about an ounce per plant under a 1K in a ebb and flow and maybe getting a little under a LB, or maybe it was less, I can't remember and don't want to mis represent you, but any how if something like his yield with a WW cross is that low then I think you are perhaps used to seeing a different style of growing than some of the more advanced and yeh, sometimes anal growers. I mean, GK has a thread that has been floating around for almost a year where he showed I think 3 plants being grown out in MG with a ph of 8 for a while and I think only 3 watering for almost the first 3 weeks under CFL's and I believe the yield was almost 1/2 a LB and if someone in hydro with 16 or more plants can hardly double that then,,??? I will leave the rest to your imagination.
Shallow Hal has a thread on here entitled, "What's in the flower room? And he is getting a ounce per plant throwing them into flower almost as soon as their rooted and I believe that his area is maybe 4x4 and he can put a couple dozen or more plants in there under 2 600W's if I understood him right, and he doesn't have any thing fancy going on in the way of inviermental controllers, not even a hydro grow, but rather coco.
In summery, I guess that I just want to say that, experience does play a large part in growing, if people see there nuggs getting fat and tight with lights close and didn't see that when they were further, what should they do?? If people see 100's of grows where people are dropping the lights right on the plants and getting killer harvests, what would they try? I love you CJ and am not trying to knock you around just putting my thoughts out there and don't necessarily expect them to change your views, but figured that my opinions were as viable as anyone else's on this thread so I put them out there.
Adieu and in the famous words of GK, Iloveyou

[Garden Knowm]

Adieu and in the famous words of GK, Iloveyou

WORD

[Racerx]

I think of it the same way as hydroponics. Hydroponics are not natural, and you will never find that situation in the natural. There is far more dissolved oxygen and nutrients available to the plant then what would ever occur naturally. This is why the hydroponic plants grow at such an accelerated rate...because MJ can take more then what soil gives it. Light is just the same In My Opinion. Of course you can reach a point of diminishing returns when it comes to light, but in general...if you can take care of the heat...then the more the merrier.

I think you also are not taking into account that while Cervantes book is great...he obviously knows his stuff...but hes an old timer. Have you EVER EVER met an old timer that grows close to the canopy? Have you ever met an old timer that uses CO2 and environment controllers? Fancy air cooling? Ive met a lot of growers, and a lot of them older people, and they are all pretty set in their ways because it works well. Some of them even pull a decent yield (2lbs+ per light), but I promise you... none of their buds come close in size to what I see around here. The stuff that younger people are growing is out of this world, because they are more apt to spend the cash on the newer equipment, etc. Aircooling is really only a thing of the last 10 years...and I will argue that its only in the last 7-8 airs that its really caught on. So when Cervantes says that you risk burning foliage at 18" away? I mean you obviously know that PLENTY of people have their lights far far far closer then that without a hint of burning (me included). With a good room temp, a nice strong fan, an oscillating room fan, and a glass aircooled hood...you can get inches away. Does that mean you get better buds with 6" away compared to 10" away? I wont argue that small of a detail but you get my point. But 12" versus 20"? I will definitely argue that one.

Here is my reasoning behind it. I know already that having my lamps very close will not burn my plants, so there is no inherent risk. All I am risking is LESS product. Well I already know from personal experience that that is not true. But lets say for arguemental sake that having the lamps 12" away gets the same amount of product as 36" away. But with the lamp 12" away, you have 20 big fat colas and some nice side nugs, but with the 36" away lamp, you have tons and tons of smaller buds. Well...same amount of product, except everyone likes big top colas better and no one wants to sit around for weeks trimming tiny little branches and buds when you can be done in a few days trimming big kahunas. Well thats not the case...cause Ive experimented enough to know that not only will I get bigger colas with a close lamp...Ill get more weight too.

Trainwreck is great for writing...joint did me well. hopefully there arent many spelling mistakes. And remember, like others have said. Im not "right". Its my opinion...but I think your being shown that the information your basing your claims upon...are simply outdated. 100%.

[2MC5]

250 watts will cover 5-12 squar feet

400 watts will cover 8-20 squar feet

600 watts will cover 12-30 squar feet

1000 waats will cover 20-50 squar feet

hope i helped

[BlueBear]

Hey, here is a thread where the guy pulled 40 OZ's off of 2 600W's with one month veg and kept the lights approx 4 inches away from tops. Thought that it might be inspiring for the close light school of growers.
http://www.icmag.com/ic/showthread.p...&highlight=POG
Adieu

[ericwt]

Thanks BlueBear. That was cool. The guy is a growing god. I am inspired!